<template>
    <div>
        <!-- 顶部滑动条区域 -->
        <div id="slider" class="mui-slider">
				<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
					<div class="mui-scroll">
						<a :class = "['mui-control-item',item.id == 0 ? 'mui-active' :'']" v-for="item in cates" :key="item.id" @click="getPhotoListByCateId(item.id)">
							{{item.title}}
						</a>
						
					</div>
				</div>

		</div>
		<!-- 图片列表区域 -->
		<ul class="Photo-list">
			<router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/' + item.id" tag="li">
				<img v-lazy="item.img_url">
				<div class="info">
					<h1 class="info-title">{{item.title}}</h1>
					<div class="info-body">{{item.zhaiyao}}</div>
				</div>
			</router-link>
		</ul>
    </div>
</template>

<script>
import { Toast } from "mint-ui";
import mui from '../../lib/mui/js/mui.min.js'  //导入mui的js文件
//2. 初始化滑动控件
export default {
    data(){
        return {
			cates:[], //所有分类的列表数据
			list:[],//图片列表api
		}
	},
	created(){
		this.getAllCategory();
		this.getPhotoListByCateId(0);//默认进入页面就主动请求 所有图片的数据	
	},
    mounted(){
        mui('.mui-scroll-wrapper').scroll({
            deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
        });
	},
	methods:{
		getAllCategory(){
			//获取所有图片分类
			this.$http.get('api/getimgcategory').then(result=>{
				if(result.body.status === 0){
					//手动拼接出最完整的分类列表
					result.body.message.unshift({title:'全部',id:0})
					this.cates = result.body.message
				}
			})
		},
		getPhotoListByCateId(cateId){
			//根据分类id 获取图片列表
			this.$http.get('api/getimages/' + cateId).then(result=>{
				if(result.body.status === 0){
					this.list = result.body.message;
					if(this.list.length === 0){
						Toast({
							message: '没有数据',
							
							duration: 1000
						});
					}
				}
			})
		}
	}
}
</script>

<style lang="scss" scoped>
*{
    touch-action: pan-y
}
.Photo-list{
	list-style: none;
	margin: 0;
	padding:10px;
	padding-bottom: 0;
	li{
		background-color: #ccc;
		text-align: center;
		margin-bottom: 10px;
		box-shadow:0 0 10px #999;
		position: relative;
		img{
			width:100%;
			vertical-align: middle;
		}
		img[lazy=loading]{
			width: 40px;
			height: 300px;
			margin: auto;
		}
		.info{
			color:white;
			text-align: left;
			position: absolute;
			bottom: 0px;
			
			background-color:rgba(0,0,0,0.4);
			max-height: 85px;
			.info-title{
				font-size: 14px;
			}
			.info-body{
				font-size: 13px;
			}
		}
	}
}
</style>      